Experimental Study on Dewatering Effect and Strength of Chaohu Sludge Treated by Soilags

DOI

10.2991/978-94-6463-726-7_41How to use a DOI?

Keywords

Silt dredging; Soilbags; Dehydration Rate; Flocculant; Compressive Strength

Abstract

The silt dredging project can effectively control the adverse effects of sediment accumulation at the bottom of the lake channel on the navigation channel, ensuring the full play of navigation benefits. The dehydration treatment of silt is a crucial part of the dredging project. Based on the channel dredging project in the Chaohu Lake area of the Yangtze River-Huaihe River Water Diversion Project, this paper utilizes the dehydration properties of soilbags to dehydrate the silt from Chaohu Lake. Through dehydration rate tests of soilbags, the study investigates the impact of flocculant types and flocculants with different molecular weights on the dehydration performance of Chaohu Lake silt, and selects the flocculant type and optimal molecular weight most suitable for treating the silt in the Chaohu Lake area. After the completion of the tests, the water content and strength of the silt inside the dehydrated soilbags were tested, and the compressive strength of the dehydrated soilbags was also tested. The results show that adding flocculants can effectively improve the dehydration performance of silt, reduce its water content, and give the silt a certain degree of strength. The flocculant dominated by anionic polyacrylamide has the best effect on treating the silt in the Chaohu Lake area, with an optimal molecular weight ranging from 10 to 12 million. When the molecular weight exceeds 12 million, the flocculation effect decreases instead, and the dehydrated soilbags exhibit good compressive strength. The dewatered soilbags exhibit good compressive strength, which is largely unrelated to the material inside the bags.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Dengxiang Li
AU  - Cheng Wang
AU  - Yanqiao Wang
AU  - Jicheng Wu
AU  - Yuming Zhang
AU  - Xiaotao Shi
PY  - 2025
DA  - 2025/06/13
TI  - Experimental Study on Dewatering Effect and Strength of Chaohu Sludge Treated by Soilags
BT  - Proceedings of the 2024 6th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2024)
PB  - Atlantis Press
SP  - 421
EP  - 433
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-726-7_41
DO  - 10.2991/978-94-6463-726-7_41
ID  - Li2025
ER  -